:root {
    /* Colors */
    --primary: #2563EB;
    --primary-light: #3B82F6;
    --accent: #10B981;
    --background: #F9FAFB;
    --text: #1F2937;
    --text-light: #6B7280;
    --border: #E5E7EB;
    --white: #FFFFFF;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Transitions */
    --transition: 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.5;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Styles */
.sidebar {
    width: 260px;
    background-color: var(--white);
    border-right: 1px solid var(--border);
    padding: var(--spacing-md);
    transition: transform var(--transition);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
}

.logo {
    color: var(--primary);
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.nav-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    color: var(--text);
    text-decoration: none;
    border-radius: 0.5rem;
    transition: all var(--transition);
}

.nav-item:hover {
    background-color: var(--background);
}

.nav-item.active {
    background-color: var(--primary);
    color: var(--white);
}

.icon {
    width: 1.5rem;
    height: 1.5rem;
    margin-right: var(--spacing-sm);
}

/* Main Content Styles */
.main-content {
    flex: 1;
    padding: var(--spacing-xl);
    overflow-y: auto;
}

.page {
    display: none;
    animation: fadeIn 0.3s ease;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.page.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

/* Card Styles */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.card {
    background-color: var(--white);
    border-radius: 0.5rem;
    padding: var(--spacing-lg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: transform var(--transition);
    opacity: 0;
    transform: translateY(20px);
    animation: slideInUp 0.5s ease forwards;
}

.card:hover {
    transform: translateY(-2px);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.stat {
    font-size: 2rem;
    font-weight: 600;
    color: var(--primary);
    margin-top: var(--spacing-sm);
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    gap: var(--spacing-sm);
}

.btn.primary {
    background-color: var(--primary);
    color: var(--white);
}

.btn.primary:hover {
    background-color: var(--primary-light);
}

.btn.outline {
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}

.btn.outline:hover {
    background-color: var(--background);
}

.btn.small {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.875rem;
}

.btn.small .icon {
    width: 1rem;
    height: 1rem;
}

/* Table Styles */
.table-container {
    background-color: var(--white);
    border-radius: 0.5rem;
    overflow: hidden;
}

.invoice-table {
    width: 100%;
    border-collapse: collapse;
}

.invoice-table th,
.invoice-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.invoice-table th {
    background-color: var(--background);
    font-weight: 500;
}

/* Target the last td in each row of the tbody */
/* Target the last td in each row of the tbody */
tbody#invoices-table-body tr td:last-child {
    display: flex; /* Changed from table-cell to flex */
    flex-direction: row; /* Added to align buttons horizontally */
    height: 105px;
    padding: 16px;
    align-items: center;
    justify-content: center;
    gap: 8px;
  }
  
  /* Target all buttons inside the last td of each row in the tbody */
  tbody#invoices-table-body tr td:last-child button {
    display: inline-flex; /* Changed from inline-block to inline-flex */
    padding: 8px;
    height: auto;
    align-items: center;
  }

/* Invoice Item Styles */
.invoice-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border);
    transition: background-color var(--transition);
}

.invoice-item:hover {
    background-color: var(--background);
}

.invoice-item > div {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.invoice-item span {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background-color: var(--white);
    border-radius: 0.5rem;
    width: 100%;
    max-width: 500px;
    padding: var(--spacing-lg);
    position: relative;
    animation: slideUp 0.3s ease;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

#invoice-form {
    overflow-y: auto;
    padding-right: var(--spacing-md);
    /* Smooth scrolling */
    scroll-behavior: smooth;
}

/* Style the scrollbar */
#invoice-form::-webkit-scrollbar {
    width: 8px;
}

#invoice-form::-webkit-scrollbar-track {
    background: var(--background);
    border-radius: 4px;
}

#invoice-form::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

#invoice-form::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text);
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group input:invalid {
    border-color: #DC2626;
    background-color: #FEF2F2;
}

.form-group input:invalid:focus {
    box-shadow: 0 0 0 4px rgba(220, 38, 38, 0.1);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    position: sticky;
    bottom: calc(-1 * var(--spacing-lg));
    background: var(--white);
    padding-top: var(--spacing-md);
    margin-top: auto;
    margin-left: calc(-1 * var(--spacing-lg));
    margin-right: calc(-1 * var(--spacing-lg));
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
    border-top: 1px solid var(--border);
}

/* Print Styles */
.print-only {
    display: none;
}

@media print {
    .app-container {
        display: none;
    }
    
    .print-only {
        display: block;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Add animation delay for cards */
.dashboard-grid .card:nth-child(1) { animation-delay: 0.1s; }
.dashboard-grid .card:nth-child(2) { animation-delay: 0.2s; }
.dashboard-grid .card:nth-child(3) { animation-delay: 0.3s; }

/* Mobile Responsive */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text);
    transition: all var(--transition);
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: 100;
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .main-content {
        padding: var(--spacing-md);
    }
    
    .page-header {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .button-group {
        display: flex;
        gap: var(--spacing-sm);
        width: 100%;
    }
    
    .btn {
        flex: 1;
    }
}

/* Search Bar Styles */
.search-container {
    padding: var(--spacing-md);
    background-color: var(--white);
    border-bottom: 1px solid var(--border);
}

.search-wrapper {
    position: relative;
    max-width: 600px;
    margin: 0;  /* Changed from 'margin: 0 auto' to 'margin: 0' */
    transform-origin: left;  /* Changed from 'top' to 'left' */
    animation: expandWidth 0.3s ease;
}

.search-wrapper input {
    width: 100%;
    padding: var(--spacing-md);
    padding-left: 3rem;
    border: 2px solid var(--border);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: all var(--transition);
    background-color: var(--background);
}

.search-wrapper input:focus {
    outline: none;
    border-color: var(--primary);
    background-color: var(--white);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1.5rem;
    height: 1.5rem;
    color: var(--text-light);
    pointer-events: none;
    transition: color var(--transition);
}

.search-wrapper input:focus + .search-icon {
    color: var(--primary);
}

@keyframes expandWidth {
    from {
        transform: scaleX(0.8);
        opacity: 0;
    }
    to {
        transform: scaleX(1);
        opacity: 1;
    }
}

@media (max-width: 768px) {
    .search-wrapper {
        max-width: 100%;
    }
    
    .search-wrapper input {
        font-size: 0.875rem;
    }
}

.hidden {
    display: none !important;
}

/* Action Buttons Styles */
.action-buttons {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.btn-icon {
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    border-radius: 0.375rem;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon svg {
    width: 1.25rem;
    height: 1.25rem;
    stroke: var(--text-light);
    transition: stroke var(--transition);
}

.btn-icon:hover {
    background-color: var(--background);
}

.btn-icon:hover svg {
    stroke: var(--primary);
}

.btn-icon.edit:hover svg {
    stroke: var(--accent);
}

.btn-icon.delete:hover {
    background-color: #FEE2E2;
}

.btn-icon.delete:hover svg {
    stroke: #DC2626;
}

/* Empty State Styles */
.empty-state {
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--text-light);
    font-style: italic;
}

/* Input with Button Styles */
.input-with-button {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-button input {
    padding-right: 40px;
}

.input-with-button .btn-icon {
    position: absolute;
    right: 8px;
    padding: 4px;
}

.btn-icon.refresh:hover {
    background-color: var(--background);
    animation: spin 0.5s ease;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Multiple Items Styles */
.items-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.items-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-height: 400px; /* Add max height for scrolling */
    overflow-y: auto;
    padding-right: var(--spacing-sm);
    scroll-behavior: smooth;
}

.item-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr auto;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    align-items: end;
}

.item-row .form-group {
    margin-bottom: 0;
}

.item-row input[readonly] {
    background-color: var(--background);
    cursor: not-allowed;
}

/* Animation for new items */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
        background-color: var(--primary-light);
    }
    to {
        opacity: 1;
        transform: translateY(0);
        background-color: transparent;
    }
}

.item-row {
    animation: slideDown 0.3s ease;
}

/* Items Popup Styles */
.items-preview {
    display: flex;
    align-items: center;
    gap: 8px;
}

.items-count {
    background: var(--primary);
    color: white;
    padding: 2px 6px;
    border-radius: 12px;
    font-size: 0.75rem;
}

.items-popup {
    display: none;
    position: fixed;
    background: var(--white);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    padding: 16px;
    min-width: 300px;
    z-index: 1000;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 0.2s, transform 0.2s;
}

.items-popup.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.items-popup::after {
    content: '';
    position: absolute;
    left: var(--arrow-position, 50%);
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
}

.items-popup.above::after {
    bottom: -8px;
    border-top: 8px solid var(--white);
}

.items-popup.below::after {
    top: -8px;
    border-bottom: 8px solid var(--white);
}

.popup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.popup-title {
    font-weight: 600;
    color: var(--text);
}

.popup-close {
    padding: 4px;
    cursor: pointer;
    border: none;
    background: none;
    color: var(--text-light);
}

.popup-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px dashed var(--border);
}

.popup-item:last-child {
    border-bottom: none;
}

.item-details {
    display: flex;
    justify-content: space-between;
    width: 100%;
}

.item-name {
    flex: 1;
}

.item-info {
    display: flex;
    gap: 16px;
    color: var(--text-light);
}